NSea Crude-Forties steady as more barrels offered ex-STS

* Vitol offers Forties via STS at dated BFOE minus 15 cents

* Shell bids equivalent of dated BFOE minus 10 cents

LONDON, June 23 (Reuters) - Forties crude oil differentials
were steady on Tuesday as more oil was offered from floating
storage via ship-to-ship transfer.

FORTIES FOT-E

* Within the afternoon trading window, Vitol offered a
Forties cargo for loading via ship-to-ship (STS) transfer at
Scapa Flow for July 4-12 at dated BFOE minus 15 cents from the
vessel Abqaiq. On Monday, Vitol sold a cargo from the same
vessel for July 2-4 loading at dated minus 20 cents.

* Shell holds almost all the cargoes for July 10 and was not
reported to be offering but instead bid August cash minus 70
cents for July 4-12 loading, equivalent to around dated BFOE
minus 10 cents.

NORWEGIAN GRADES

* Norwegian state-controlled producer StatoilHydro offered
four crude cargoes on Monday, all for loading in mid-July, at
steady asking prices from Monday (premiums over dated BFOE;
Monday's levels in brackets):

- Oseberg July 18 at +1.10 (+1.10)

- Gullfaks July 15 at +1.40 (+1.50)

- Gullfaks July 18 at +1.40 (+1.50)

- Troll July 16 at +2.20 (+2.20)

REFINING MARGINS

* Complex margins for processing Brent in Rotterdam slipped
to around $3.60 per barrel on Tuesday, down from $4.50 on
Monday. <REF/MARGIN1>

SWAPS

* CFDs were assessed at the following levels at 1530 GMT
(Friday's levels in brackets):

- 29-03/7 Aug -0.76 (-0.83)

- 6-10/7 Aug -0.65 (-0.75)

- 13-17/7 Aug -0.57 (-0.65)

- 20-24/7 Aug -0.46 (-0.55)

- 27-31/7 Aug -0.33 (-0.40)

- 3-7/8 Aug -0.20 (-0.25)

ICE MINUTE MARKER

The ICE set its August Brent afternoon marker at $67.25 per
barrel, down from $69.49 per barrel on Monday.
(Reporting by Christopher Johnson; editing by James Jukwey)